A long range, hit-to-kill, non-nuclear, exoatmospheric interceptor of reentry vehicles from strategic intercontinental ballistic missiles. The GBI is an element of the NMD weapons system, which is being developed to protect the United States. The GBI is being designed to engage post-boost and/or RVs during the midcourse phase of their flights and will be fully compliant with ABM Treaty requirements. The GBI is the successor to ERIS. See also EKV.